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Finding the Fourth Proportional to 86,576.40, 129,864.60 and 57,011.40

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Solution

The fourth proportional to 86,576.40, 129,864.60 and 57,011.40 is: 85,517.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,576.40 : 129,864.60 = 57,011.40 : x
  2. Step 2: Convert to fraction form
    86,576.40/129,864.60 = 57,011.40/x
  3. Step 3: Cross multiply
    86,576.40x = 129,864.60 × 57,011.40
  4. Step 4: Simplify right side
    86,576.40x = 7,403,762,656.44
  5. Step 5: Solve for x
    x = 7,403,762,656.44/86,576.40
  6. Step 6: Final answer
    x = 85,517.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.